Noun
Various dipterous insects of the family Cecidomyiidae (gall midges, gall gnats) that are pests of wheat:
Contarinia tritici (formerly Diplosis t.) that lays its eggs in the flowers of wheat-heads, and whose reddish larvae devour the kernels
Hessian fly, Mayetiola destructor
Sitodiplosis mosellana
Lasioptera obfuscata
Source: en.wiktionary.orgwheat-midge